Dictionary of Nomenclature of Celestial Objects

N
Object:Region  (SIMBAD class: PartofG = Part of a Galaxy)
in source:M 33 = NGC 598
in source:M 51 = NGC 5194
in source:M 101 = NGC 5457
Ref:=1971ApJ...168..327S
bySEARLE L.
 Astrophys. J., 168, 327-341 (1971)
  Evidence for composition gradients across the disks of spiral galaxies.
oTable 2: <[S71] M 33 NN> N=30, Table 2: <[S71] M 101 NN> N=13, <[S71] M 51 N> N=5

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